Hydrostatic pressure-induced huge enhancement of critical current density and flux pinning in Fe1-xCoxSe0.5Te0.5 single crystals
IR@NPL: CSIR-National Physical Laboratory, New Delhi
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| Title |
Hydrostatic pressure-induced huge enhancement of critical current density and flux pinning in Fe1-xCoxSe0.5Te0.5 single crystals
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| Creator |
Sang, Lina
Shabbir, Babar Maheshwari, Pankaj Qiu, Wenbin Ma, Zongqing Dou, Shixue Cai, Chuanbing Awana, V. P. S. Wang, Xiaolin |
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| Subject |
Applied Physics/Condensed Matter
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| Description |
We performed a systematic study of the hydrostatic pressure (HP) effect on the superconducting transition temperature (T-c), critical current density (J(c)), irreversibility field (H-irr), upper critical field (H-c2), and flux pinning mechanism in un-doped and 3 at.% Co-doped FeSe0.5Te0.5 crystals. We found that T-c is increased from 11.5 to 17 K as HP increases from 0 to 1.2 GPa. Remarkably, the J(c) is significantly enhanced by a factor of 3 to 100 for low and high temperature and field, and the H-irr line is shifted to higher fields by HP up to 1.2 GPa. Based on the collective pinning model, the delta l pinning associated with charge-carrier mean free path fluctuation is responsible for the pinning mechanism of Fe1-xCoxSe0.5Te0.5 samples with or without pressure. A comprehensive vortex phase diagram in the mixed state is constructed and analysed for the 3 at.% Co-doped sample.
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| Publisher |
Institute of Physics
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| Date |
2018-02
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://npl.csircentral.net/3787/1/Hydrostatic%20pressure-induced%20huge.pdf
Sang, Lina and Shabbir, Babar and Maheshwari, Pankaj and Qiu, Wenbin and Ma, Zongqing and Dou, Shixue and Cai, Chuanbing and Awana, V. P. S. and Wang, Xiaolin (2018) Hydrostatic pressure-induced huge enhancement of critical current density and flux pinning in Fe1-xCoxSe0.5Te0.5 single crystals. Superconductor Science and Technology , 31 (2). 025009-025018. ISSN 0953-2048 |
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| Relation |
http://npl.csircentral.net/3787/
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